fix: small fixes

internal/agent/client.go

@@ -33,7 +33,7 @@ type Config struct {
 	EnrollSecret string
 	Name         string // optional friendly name
 	StatePath    string // where the enrolled id+token are persisted
-	TunnelAddr   string // host:port for the direct forward tunnel (e.g. REDACTED:8446); empty disables
+	TunnelAddr   string // host:port for the direct forward tunnel (e.g. panel.example:port); empty disables
 	// TunnelPinned keeps TunnelAddr as configured locally (TUNNEL_ADDR /
 	// TUNNEL_PORT) instead of following the address set in the panel.
 	TunnelPinned bool